Drilling-machine.



C. A. HULTQUIS?. DRILLING MACHINE.

APPLICAHON FILED DEc.2, 191s.

Patented Nov. 5, 1918.

2 SHEETS-SHEET l.

' Mmmm" M C. A. HULTQUIST.

' DRlLLeNG MACHINE.

APPLICATION FILED DEC.28.1916.

2 SHEETS-SHEET 2.

Pztented Nov. 5, 1918.

'CHARLES A. HULTQUISLOF LUS ANGELES, GALIFORFHA.

DRlILLING-MACHINE.

igaedoe.

Specification of Letters Patent.

Patentedilwovr, 118.

Application filed December 28, 1916. Serial 150.139,310.

ToaZZ 'whom may concern:

Beit known that l, Ci-iiinLiis A. Huur- QUisr, a citizen of the United States, resid-` ing at Los Angeles, in the county of Los Angeles and State of California, `have invented anew and useful Drilling-Machine, of `Whichthe `following is a specification.

This invention relates to devices of the character designed to effect turning of a drillsteel of fiuidfoperated tools, such, for instance, as stoping machines, and an object ofthe invention is to effect such turning of the drill by simple mechanism not liable to get 'outof order.

`Another object is to produce mechanism of thischaracterin which thepower impulse forturningthedrill willbe delivered to the body of the drilling machine withmaximuin effectiveness.

VOther objects andadvantages will appear in the subjoined' detail description.

The laccoinpanying .drawings illustrate two embodiments of the invention: y

Figure l isaside [elevation `of ,a drilling machine embodying one 4form of A#the inven- @i011 vwhereby Aoscillation of the drillsteel is effected, portions of `the drill steel, feed cylinder and `handle being broken away to contract the view.

Fig. 2 .isanenlarged elevation mainly in midsectionfofthe machineshown in Fig. 1,

`only a ,fragment 0f thebody of the mamchine Fig. 3 is a plan section on line indicated by wfffva, rEs- 2- Fig. 4 "is a ,plan sectionfuonV `line indicated ait-.fm2 Fig. 2, the vhandle being omitted to contracttheview.`

v Fig. 5 is a ,plan section on line indicated by na-m5, Fig. r2.

Fig. l6 is an elevationmainly in midsection of a modiedform of the invention, whereby lcomplete rotation of the drill steel iseifected.

Fig, 7` isa plansection .on line indicated Vby :v7-fw?, Eig. `6, the handle being omitted to contract the View.

Fig. ,8 is a v`sectional `elevation on irregular line indicatedgby ais-m8, Fig. G. e

Fig. 9 isa 'plan section on line indicated vrlhere is provided a cylinder l having at one end thereof ya :chuck 2 to hold the drill steel 3 in a manner well `understood in the drillingart. ."Ihe opposite end of the cylinder "l Visprovided with a feed cylinder 4 `having therein a feed piston 5 operated' by conipressed fluid so as to press the drill against the material to be drilledin a manner .well

understood in the drilling art. `The ,type of drillingmachine sho-wn in Fig. lis termed,

in the drillingart, a stoping machine, but

the features of theinvention hereinafter to. be described may be used in` connection with other types of drilling machines. e

The cylinder "1 and feed cylinder 4 constitute the bodyof the drillinginachineand means are provided to turn saidbody` about its longitudinal axis and said means` will now be described: The feed cylinder 4, or any othersuitable portionof the "body, "is gournaled in a bushing `or bushings `6 of bearings 7 which are at `opposite sides tof .a transversely disposed member forming a casing or jacket 8. I

Now referring more particularly to Figs. 2 to 5 inclusive, Asurrounding theA feed cylinder 4 within the jacketSis a 'collar 9 having a slot 10'so as to allow jsaidjcollar to expand and to be contracted'hy a bolt '11 in order to clamp said collar tightly in place between the `opposing ends of thebearings `7, said collar and bearings thus preventing end playof the body l, 4. rlthe collar 9 "is yprovided with radial arms 12piv`oted` at 13 to operating rods 114, the arms 12 being diametrically opposite `one another. `The rods 14 are pivoted at 15 to ears 1G of an enlargement orshoulder 17 of a riflebar 18.

Now. referringmore particularly to Figs. `6 to 9 inclusive, the feed cylinder 4 shown therein issurrounded a spurrgear 19 which is housed in the jacket '8 and which is fastened to the feedcylinder 4 by a pin, screw orthe equivalent20. 'The gear `19and bearings 7 prevent end playof the feed cylinder 4.

rlhe spur gear 19 meshes with a spur gear seated in the recess. When the enlargement 17 is rotated clockwise in Fig. 7 it turns the spur gear 21 clockwise so as to operate the spur gear 19 counterclockwise, thereby turning the feed cylinder 4 and the drill steel 3 counterclockwise. When the enlargement 17 is turned counterclockwise the pawls 23 slip over the ratchet teeth 22 as is readily understood so that the feed cylinder and drill steel will not be turned.

The upper and lower faces of the enlargement 17, see Fig. 6, are preferably engaged by wear plates28, which plates prevent end play of the rifle bar 18. j

Now referring again to the drawings of both embodiments of the invention the rifle bar 18 is j ournaled adjacent the shoulder 17 by upper and lower bearings 29, 30 of the jacket 8, the shoulder 17 and bearings 29, 30 in Fig. 2 preventing end play of the rifle bar. The rifle bar is provided with a helical groovel or with helical grooves 31 which engage a helical tongue or tongues 32 in a bushing 33 of a plunger 34, said bushing being screw-threaded into the upper end of the plunger and extending for but a portion of the length of said plunger which is hollow to` accommodate the rifle bar 18 when the plunger moves on its up-stroke.

The plunger 34 works in a cylinder 35 and isprovided with a splineway 36 engaged by a spline 37 which projects inward from the cylinder wall so as to prevent relative turning between said plunger and the cylinder. It is clear that, owing to the foregoing described construction, if the plunger 34 be reciprocated it will cause, in Figs. 2 to 5 inclusive, oscillation of the collar 9 which in turn will cause the feed cylinder 4 to oscillate so as to turn the drill steel 3. In Figs. 6 to 9 reciprocation of the plunger 34vwil1 rotatethe spur gear 19 step by step so as to transmit a step by step movement in one direction to the feed cylinder and drill steel, upward movement of the plunger producing the movement and downward movement of said plunger being ineffective to produce reverse movement of the drill steel on account of the pawls 23 slipping over the f ratchet teeth 22.

'35 is provided adjacent its ends with ports 39, 4Q connected by ducts 41, 42 respectively with any suitable valve mechanism a such, for instance,"as that already known in the pneumatic tool art and shown in the drawings, but not described in detail herein since it forms no part of this present invention. The cylinder 35 is also provided with ports 43, 44 positioned so as to be opened when the plunger 34 is at or near the end of its up stroke and down stroke respectively. These ports 43, 44 are connected by ducts 45, 46 respectively to the valve mechanism a so as to cause shifting thereof in a manner well understood to alternatively 'admit operating fluid through the ports 40, 39 to the cylinder 35 to first move the plunger downward and then upward so as to oscillate the rifle bar 18, to thereby produce oscillation of the drill steel in the form of the invention shown in Figs. 2 to 5, and to thereby produce step by step rotation in one direction of the drill steel in the form of the invention shown in Figs. 6 to 9 inclusive as described 85 hereinbefore in detail.

Assuming that the parts are in the positions shown in Figs. 2 to 5 inclusive, it is clear that the compressed air or other operating luid will flow from the valve device a through the port 39 so as to force the plunger 34 upward to turn the collar 9 in the direction of the arrow b, Fig. 4, thus to turn the feed cylinder 4 and thereby turnvthe drill steel 3 to the left in Fig. 1.

When the plunger 34 reaches the end of its up stroke it uncovers the port 43 so as to admit compressed lluid from the cylinder 35 through the duct 45 to the valve device to operate it in a manner well understood in the art to cut off the air supply from the duct 41 and to supply air through the duct 42 to the upper end of the cylinder 35 to drive the plunger 34 on its down stroke and thereby turn the collar 9 vin a direction op- 105 posite to that indicated by the arrow to thereby turn the.drill steel to the right in Fig. 1.

The valve device .a thus continues to alternatlvely admit air to opposite sides of 110 the plunger 34 so as to oscillate the feed cylinder 4, the oscillations of said feed cylinder being transmitted to the drill steel 3 so as to produce the desired changes in the relation of the cutting edges to the sur- 115 faces acted on by the drill steel.

In Figs. 6 to 9 inclusive, assuming that the parts are in the positions shown in said figures, it is readily understood from the hereinbefore described operation of the 120 form of the invention shown in Figs. 2 to 5 inclusive, that the plunger 34 has just completed its 11p-stroke `for causing turning of the drill steel to the left in Fig. 1, that the next stroke of said plunger will be down 125 and that during said down stroke the pawls 23 will slip over the ratchet teeth 22, and that during the next succeeding up-stroke of the plunger the drill steel 3 will be `given further rotation to the left. Thus successive 130 Lanaro@ instead of just the-chuck is that in event of a relatively long` drill steel being employed to drill a hole horizontally or approaching` a horizontal the drill steel Will tend to cause tilting of the chuck Within its bearing member and consequently cause binding between the bushing and said bearing member if the chuck itself be rotated, but if the body itself of the drilling machine be turned, as in this invention, such binding does not occur. Applicants construction for this reason is es pecially preferable to the old construction 1n stoping machines When drilling at a considerable angle to the vertical, in such stoping machines the feeding mechanism being connected directly to the body of the drilling machine.

lt claim:

l. The combination with the body of a drilling machine, of rods pivotally connected with said body, and means to reciprocate said rods to oscillate the body.

2. The combination With the body of a drilling machine, of a cylinder, a plunger in said cylinder, means to prevent turning of the plunger, means to alternatively admit an operating,` 'luid on opposite sides of the plunger, a rifle bar oscillated by reciprocation of the plunger, and a rod pivotally cone nected with the rifle bar and body of the drilling1 machine.

Signed at Los Angeles, California, this 19th day of December, 1916.

CHARLES A. HULTQUST.

Witnesses:

GEORGE H. l-Irnns, A. F. SCHMIDTBAUER.

Copies of this patent may be obtained for ve cents each, "by addressing the Commissioner mt' Patente,

ashington, D. 1U. 

